<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="marginbottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 章节 -->
    <ul class="chapterVideoList">
    <li
      v-for="chapter in chapterVideoList"
      :key="chapter.id">
      <p>
        {{ chapter.title }}
    <span class="acts">
      <el-button type="text" @click="openVideoDialog(chapter.id)">添加小节</el-button>
      <el-button style="" type="text"  @click="openEditChapter(chapter.id)">编辑</el-button>
      <el-button type="text"@click="removeChapter(chapter.id)">删除</el-button>
    </span>
      </p>
    <!-- 视频 -->
      <ul class="chanpterList videoList">
        <li
          v-for="video in chapter.children"
          :key="video.id">
          <p>{{ video.title }}
            <span class="acts">
              <el-button type="text" @click="openEditVideo(video.id)">编辑</el-button>
              <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
            </span>
          </p>
        </li>
      </ul>
    </li>
    </ul>

    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

      <!-- 添加和修改章节表单 -->
    <el-dialog
      :visible.sync="dialogChapterFormVisible"
      title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number
            v-model="chapter.sort"
            :min="0" controlsposition="right"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加小节">
      <el-form :model="video" label-width="120px">
        <el-form-item label="小节标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="小节排序">
          <el-input-number
            v-model="video.sort"
            :min="0"
            controlsposition="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
         <el-upload
           :on-success="handleVodUploadSuccess"
           :on-exceed="handleUploadExceed"
           :on-remove="handleVodRemove"
           :before-remove="beforeVodRemove"
           :file-list="fileList"
           :action="BASE_API+'/eduvod/video/uploadVideo'"
           :limit="1"
           class="upload-demo">
           <el-button size="small" type="primary">上传视频</el-button>
           <el-tooltip placement="right-end">
             <div slot="content">最大支持1G，<br>
               支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
               GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
               MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
               SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
             <i class="el-icon-question"/>
           </el-tooltip>
         </el-upload>
        </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>

  </div>
</template>
<script>
  import chapter from '@/api/chapter'
  import video from '@/api/video'

  export  default {
    data(){
      return{
        saveBtnDisabled: false, // 保存按钮是否禁用
        chapterVideoList:[],
        courseId: '',
        dialogChapterFormVisible:false,
        dialogVideoFormVisible:false,
        chapter:{
          title: '',
          sort: 0
        },
        video:{//小节对象
          title: '',
          sort: 0,
          free: 0,
          videoSourseId: '',
          videoOriginalName: ''
        },
        fileList: [],//上传文件列表
        BASE_API: process.env.BASE_API // 接口API地址

      }
    },

    created() {
      //获取路由id值
      if(this.$route.params && this.$route.params.id){
        this.courseId = this.$route.params.id;
        this.getChapterVideo()
      }

    },

    methods: {
      previous() {
        console.log('previous')
        this.$router.push({ path: '/course/info/'+this.courseId })    },

      next() {
        console.log('next')
        this.$router.push({ path: '/course/publish/'+this.courseId })
      },

      //根据课程id查询章节和小节
      getChapterVideo(){
        chapter.getAllChapterVideo(this.courseId)
        .then(response =>{
          this.chapterVideoList = response.data.allChapterVideo;
        })
      },

      //
      saveOrUpdate(){
        if(!this.chapter.id){
          this.addChapter();
        }else{
          this.updateChapter();
        }
      },
      //添加章节
      addChapter(){
        //设置课程id到chapter对象里面
        this.chapter.courseId=this.courseId;
        chapter.addChapter(this.chapter)
          .then(response => {
            //关闭弹窗
            this.dialogChapterFormVisible = false;
            //提示
            this.$message({
              type: 'success',
              message: '添加章节成功!'
            })
            //刷新页面
            this.getChapterVideo();
          })
      },

      //打开弹窗
      openChapterDialog(){
        this.dialogChapterFormVisible=true;
        //清空数据
        this.chapter.title='';
        this.chapter.sort=0;
      },

      //获取章节弹框数据
      openEditChapter(chapterId){
        this.dialogChapterFormVisible=true;
        chapter.getChapterById(chapterId)
        .then(response =>{
          this.chapter = response.data.chapter;
        })
      },
      //修改章节
      updateChapter(){
        chapter.updateChapter(this.chapter)
        .then(response =>{
          //关闭弹窗
          this.dialogChapterFormVisible = false;
          //提示
          this.$message({
            type: 'success',
            message: '修改章节成功!'
          })
          //刷新页面
          this.getChapterVideo();
        })
      },
      //删除章节
      removeChapter(courseId){
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          return  chapter.deleteChapterById(courseId)
        }).then(() => {
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          //刷新页面
          this.getChapterVideo();
        }).catch((response) => { // 失败
          if (response === 'cancel') {
            this.$message({
              type: 'info',
              message: '已取消删除'
            })
          } else {
            this.$message({
              type: 'error',
              message: '删除失败'
            })
          }
        })
      },
      //***********************小节操作*****************
      //添加小节弹框的方法
      openVideoDialog(chapterId){
        this.dialogVideoFormVisible = true;
        //设置章节id
        this.video.chapterId = chapterId;
        //清空数据
        this.video.title='';
        this.video.sort=0;
        this.video.free=0;
        this.video.videoSourseId='';

      },
      saveOrUpdateVideo(){
        if (!this.video.id) {
          this.addVideo();
        } else {
          this.updateVideo();
        }

      },
      //添加小节
      addVideo(){
        this.video.courseId = this.courseId;
        video.addVideo(this.video)
        .then(response => {
          //关闭弹窗
          this.dialogVideoFormVisible= false;
          //提示
          this.$message({
            type: 'success',
            message: '添加章节成功!'
          })
          //刷新页面
          this.getChapterVideo();
        })
      },
      //获取小节
      openEditVideo(videoId){
        this.dialogVideoFormVisible=true;
           video.getVideoById(videoId)
          .then(response =>{
            this.video = response.data.video;
          })
      },
      //修改章节
      updateVideo(){
        video.updateVideo(this.video)
          .then(response =>{
            //关闭弹窗
            this.dialogVideoFormVisible = false;
            //提示
            this.$message({
              type: 'success',
              message: '修改章节成功!'
            })
            //刷新页面
            this.getChapterVideo();
          })
      },
      //删除小节
      removeVideo(videoId){
        this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          return   video.deleteVideoById(videoId);
        }).then(() => {
          this.$message({
            type: 'success',
            message: '删除成功!'
          })
          //刷新页面
          this.getChapterVideo();
        }).catch((response) => { // 失败
          if (response === 'cancel') {
            this.$message({
              type: 'info',
              message: '已取消删除'
            })
          } else {
            this.$message({
              type: 'error',
              message: '删除失败'
            })
          }
        })
      },
   //*********************视频上传****************
      handleVodUploadSuccess(response, file, fileList) {
        this.video.videoSourceId = response.data.videoId;
        this.video.videoOriginalName = file.name;
      },
      //视图上传多于一个视频
      handleUploadExceed(files, fileList) {
        this.$message.warning('想要重新上传视频，请先删除已上传的视频')
      },
      //删除视频
      beforeVodRemove(file, fileList){
        return this.$confirm('确定移除 ${file.name}?');
      },
      handleVodRemove(file, fileList){
        //调用接口删除视频
        video.deleteAliyunVideoById(this.video.videoSourseId)
        .then(response =>{
          //提示
          this.$message({
            type: 'success',
            message: ' 删除成功!'
          })
          this.fileList=[];
          this.video.videoSourceId = '';
          this.video.videoOriginalName='';
        })
      }



    }

  }

</script>
<style scoped>
  .chapterVideoList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
  }
  .chapterVideoList li{
    position: relative;
  }
  .chapterVideoList p{
    float: left;
    font-size: 20px;
    margin: 10px 0;
    padding: 10px;
    height: 70px;
    line-height: 50px;
    width: 100%;
    border: 1px solid #DDD;
  }
  .chapterVideoList .acts {
    float: right;
    font-size: 14px;
  }
.videoList{
  padding-left: 50px;
}
  .videoList p{
    float: left;
    font-size: 14px;
    margin: 10px 0;
    padding: 10px;
    height: 50px;
    line-height: 30px;
    width: 100%;
    border: 1px dotted #DDD;
  }
</style>

